What is stone mastic asphalt used for?
Stone mastic asphalt is a thin yet resistant asphalt surfacing mix with very good rut resistance properties and superior durability. It can be used as a base course mix for all sophisticated building needs and is primarily used for heavily trafficked roads, but it can be used for all types of pavements.
What is stone mastic asphalt made of?
Typical SMA composition consists of 70−80% coarse aggregate, 8−12% filler, 6.0−7.0% binder, and 0.3 per cent fibre. The deformation resistant capacity of SMA stems from a coarse stone skeleton providing more stone-on-stone contact than with conventional dense graded asphalt (DGA) mixes (see above picture).
What is the meaning of mastic asphalt?
Definition of asphalt mastic : a mixture of asphalt and other material (such as sand, crushed rock, or asbestos) used like cement.
What is SMA in road construction?
Stone Matrix Asphalt (SMA) is a tough, stable, rut-resistant mixture. The SMA design concept relies on stone-on-stone contact to provide strength and a rich mortar binder to provide durability.
What is the density of stone mastic asphalt?
0.930–0.970 g/cm3
2.3. High-density polyethene (HDPE)
| Properties | Value |
|---|---|
| Polyethene (%) | 98–100 % |
| Melting Point | 120–135oC |
| Density | 0.930–0.970 g/cm3 |
| Water solubility | Negligible |
What is the difference between SMA and HRA?
The bitumen content, whilst higher than for SMA is less than used for HRA. The continuous aggregate grading gives high mechanical stability due to the aggregate particle interlock and as such is a more sensible material altogether than HRA which is a gap graded mix more akin to a plum pudding.
Which bitumen is used in mastic asphalt?
The bitumen for mastic asphalt shall be a industrial grade 85/25 bitumen meeting the requirement given in Table 1.
What is the maximum bitumen content in Mastic asphalt?
The minimum and maximum thickness of the bitumen mastic for wearing course shall be 25 mm and 50 mm respectively except for footpaths of bridges where it shall be 20 mm and 25 mm respectively.
What is bit Mac?
What is Bitmac? Bitmac is a more modern version of tarmacadam, which replaces the tar component with bitumen. Bitumen and tar are very similar and sometimes bitumen is referred to colloquially as tar and vice versa.
What is the thickness of mastic asphalt?
In terms of mechanical performance, mastic asphalt floors are similar to the bitumen modified cementitious floors but they are generally laid at a minimum of 25 mm thickness and tend to deform and corrugate in service under heavy loads.
What is the difference between bitumen and mastic?
Bitumen is used as a binding agent in asphalt-based products, which makes mastic asphalt especially durable. The primary difference between mastic asphalt and asphalt concrete lies in each material’s level of permeability. Asphalt concrete is fairly permeable under most conditions, allowing some water to seep through.
What is 6mm DBM?
6mm Dense Bituminous Macadam / Asphalt Concrete 6 Normally used on footpaths, playgrounds and drive ways. A fine close textured material that can be laid as a thin surface course often used to overlay an existing surface with a new surface course.
What is AC10?
An AC10 conviction code is an endorsement you will receive if you are caught after failing to stop after an accident. While the AC10 endorsement does not involve a measure of dangerous or careless driving, insurers will look unfavourably upon drivers carrying it.
What are asphalt grades?
The larger the pene tration number the softer the asphalt. The Asphalt Institute specifies four penetration grades: 60-70, 85-100, 120-150, and 200-300. The 60-70 grade is usually used only in pavements where traffic is very heavy such as principle city streets and very heavily trafficked rural highways.
What is a mastic layer?
What is Mastic Asphalt? Mastic Asphalt is a bituminous design mix containing ingredients bitumen, coarse aggregate, fine aggregate and filler material. It is working as a waterproofing material and used as wearing course for a whole range of construction work of roads and bridges.
Is code for mastic asphalt?
The requirements for bitumen mastic suitable for waterproofing of roofs are covered by IS : 3037-1965*. This standard is intended to cover the entire operation of treating a roof surface using bitumen mastic for waterproofing.